I FAILED EMISSION TEST WITH CODE P0420 PO300 ...

2009 Chevrolet Malibu

Tiny

Anonymous

April, 11, 2013 AT 1:07 AM

I failed emission test with code p0420 po300 andd
P0101 isit the catalytic converter or oxgen sensor? How much will I have to pay to get it repaired at a muffler shop. Oh no misfire

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2 Answers

Tiny

ASEMaster6371

April, 11, 2013 AT 1:19 AM

You need a cat. Get a good quality cat not a cheap one. After it is repaired, it needs to be driven to see if the missfire goes away. The 101 is a mass air flow code but doesn not mean it needs to be replaced. Have it checked first

Roy

Tiny

rusLAdlc

August, 28, 2013 AT 4:10 PM

Which cat would this be referring to? There's one connected to the exhaust manifold itself on the 2.4l and then there is either another one before the muffler or a resonator. Only saw sensors near the first one.

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